import fs from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const rootDir = path.resolve(__dirname, '..', '..')

const read = relativePath => fs.readFileSync(path.join(rootDir, relativePath), 'utf-8')

const files = {
    manager: 'scripts/influxdb-process-manager.js',
    mysqlManager: 'scripts/mysql-process-manager.js',
    javaRunner: 'scripts/java-runner.js',
    lifecycle: 'electron/preload/lifecycle.js',
    configGenerator: 'scripts/config-generator.js',
    javaTemplate: 'build/extraResources/java/application.yml.template',
    influxdbBat: 'build/extraResources/influxdb-1.7.0/start-influxdb.bat',
    startup: 'scripts/startup-manager.js',
    builder: 'cmd/builder.json'
}

const failures = []

if (!fs.existsSync(path.join(rootDir, files.manager))) {
    failures.push('scripts/influxdb-process-manager.js should exist')
} else {
    const source = read(files.manager)
    const checks = [
        ['manager exports InfluxDBProcessManager', /module\.exports\s*=\s*InfluxDBProcessManager/.test(source)],
        ['manager starts InfluxDB through cmd.exe and start-influxdb.bat', /cmd\.exe/.test(source) && /start-influxdb\.bat/.test(source) && /spawn\(/.test(source)],
        ['manager records process ownership', /\.running-process\.json/.test(source)],
        ['manager can stop tracked process', /stopInfluxDBProcess/.test(source) && /terminateTrackedProcess/.test(source)]
    ]
    checks.forEach(([message, pass]) => {
        if (!pass) failures.push(message)
    })
}

const lifecycleSource = read(files.lifecycle)
const configGeneratorSource = read(files.configGenerator)
const runtimePathSources = [
    ['InfluxDB process manager', read(files.manager)],
    ['MySQL process manager', read(files.mysqlManager)],
    ['Java runner', read(files.javaRunner)],
    ['config generator', configGeneratorSource]
]
const javaTemplateSource = read(files.javaTemplate)
const startupSource = read(files.startup)
const builderSource = read(files.builder)
const influxdbBatSource = read(files.influxdbBat)

const lifecycleChecks = [
    ['lifecycle loads InfluxDBProcessManager', /InfluxDBProcessManager/.test(lifecycleSource)],
    ['lifecycle stores influxdbProcessManager', /this\.influxdbProcessManager/.test(lifecycleSource)],
    [
        'lifecycle starts InfluxDB after MySQL before Java port detection',
        /ensureServiceRunning\([\s\S]*?this\.influxdbPort\s*=\s*await\s*this\.influxdbProcessManager\.ensureServiceRunning[\s\S]*?findAvailablePort\(18093/.test(
            lifecycleSource
        )
    ],
    ['lifecycle passes influxdbPort to config generator', /influxdbPort:\s*this\.influxdbPort/.test(lifecycleSource)],
    ['lifecycle stops InfluxDB during cleanup', /stopInfluxDBProcess/.test(lifecycleSource)]
]

const startupChecks = [
    ['startup has InfluxDB port step', /check-influxdb-port/.test(startupSource)],
    ['startup has InfluxDB wait step', /wait-influxdb/.test(startupSource)]
]

const packageChecks = [
    ['windows package includes InfluxDB resources', /build\/extraResources\/influxdb-1\.7\.0/.test(builderSource)]
]

const configChecks = [
    ['config generator replaces InfluxDB port placeholder', /INFLUXDB_PORT/.test(configGeneratorSource)],
    ['java template defines steady InfluxDB url placeholder', /steady:[\s\S]*influxdb:[\s\S]*url:\s*http:\/\/127\.0\.0\.1:\{\{INFLUXDB_PORT\}\}/.test(javaTemplateSource)],
    ['InfluxDB bat accepts runtime config path argument', /%~1/.test(influxdbBatSource) && /influxd\.exe\s+-config\s+/.test(influxdbBatSource)]
]

const runtimePathChecks = runtimePathSources.map(([name, source]) => [
    `${name} should not treat any process.resourcesPath as packaged runtime`,
    !/!\s*process\.resourcesPath/.test(source)
])

;[...lifecycleChecks, ...startupChecks, ...configChecks, ...runtimePathChecks, ...packageChecks].forEach(([message, pass]) => {
    if (!pass) failures.push(message)
})

if (failures.length > 0) {
    console.error(`InfluxDB startup contract failed:\n- ${failures.join('\n- ')}`)
    process.exit(1)
}

console.log('InfluxDB startup contract passed')